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  • 07-12-2016
  • Mathematics
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Find two consecutive even integers such that the square of the first, decreased by the second is 130

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MrQuizzical
MrQuizzical MrQuizzical
  • 11-12-2016
Let's make the first even integer m and the second even integer n. The square of the first, decreased by the second is 130 is:

[tex] m^{2} [/tex]-n=130  ---> Add n to each side
[tex] m^{2} [/tex]=130+n ---> Take the square root of each side
m=±[tex] \sqrt{130+n}[/tex]

Let's look at the first square number above 130, which is [tex] 12^{2}[/tex]. m is 12, therefore the next consecutive even integer is 14.

[tex] 12^{2}[/tex]=144
144-14=130

The two consecutive integers are 12 and 14
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